On Mon, 2012-10-29 at 19:37 +0530, Raghavendra K T wrote:
> +/*
> + * A load of 2048 corresponds to 1:1 overcommit
> + * undercommit threshold is half the 1:1 overcommit
> + * overcommit threshold is 1.75 times of 1:1 overcommit threshold
> + */
> +#define COMMIT_THRESHOLD (FIXED_1)
> +#define UNDERCOMMIT_THRESHOLD (COMMIT_THRESHOLD >> 1)
> +#define OVERCOMMIT_THRESHOLD ((COMMIT_THRESHOLD << 1) -
> (COMMIT_THRESHOLD >> 2))
> +
> +unsigned long kvm_system_load(void)
> +{
> + unsigned long load;
> +
> + load = avenrun[0] + FIXED_1/200;
> + load = load / num_online_cpus();
> +
> + return load;
> +}
ARGH.. no that's wrong.. very wrong.
1) avenrun[] EXPORT_SYMBOL says it should be removed, that's not a
joke.
2) avenrun[] is a global load, do not ever use a global load measure
3) avenrun[] has nothing what so ever to do with runqueue lengths,
someone with a gazillion tasks in D state will get a huge load but the
cpu is very idle.
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